Figure 1

(A) Weekly number of analyzed samples, percentage of positivity (in red boxes) and frequency of the SGTF pattern (indicative of VOC Alpha detection) during the period covering from January to June 2021. (B) Weekly number of analyzed samples and percentage of positivity (in green boxes) during the period covering from July to November 2021. The frequency of detection of VOC Delta was not assessed by SGTF but by SNP genotyping. (C) Weekly number of analyzed samples, percentage of positivity (in blue boxes) and frequency of the SGTF pattern (indicative of VOCs Omicron BA.1 and BA.5) during the period covering from January to July 2022.